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Buying a flat to rent out

Author: RealtyTM Team Verified Updated: 02 AugustAugust8 2026 · 3 min read
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Buying a flat to rent out is one of the most popular forms of investing in property. It tempts with the promise of regular income and capital protection. However, for such an investment to genuinely pay off, you have to approach it like a business venture, not an emotional purchase.

In this article we explain how to calculate the real rental yield, how to choose a location and a flat, and what risks you have to take into account. It is a practical guide for people considering placing capital in a rental property.

Key takeaways
  • Rental yield is assessed after subtracting all costs, not just on the basis of the rent.
  • The location and the tenant profile determine demand and the stability of income.
  • You have to account for the risks: vacancies, renovation costs and market changes.
  • It is worth comparing renting with other forms of placing capital.

Renting as an investment

When you buy a flat to rent out, you become an investor. Your goal is to generate income from rent and the potential growth in the property's value over time. The key is a numbers-based approach, not personal preferences, because the flat is meant to appeal to tenants, not to you.

Before buying, it is worth defining a strategy: whether you bet on long-term renting, which provides stability, or short-term renting, potentially more profitable but requiring greater involvement and carrying different risks.

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How to calculate yield

Rental yield is not the rent alone. From the income you have to subtract all costs: administrative charges, tax, any loan instalment, insurance, the cost of minor repairs and a reserve for vacancies, that is periods without a tenant. Only such a calculation shows the real profit.

A popular indicator is the ratio of annual rental income to the purchase price. It is worth calculating it honestly, including transaction costs and finishing. Overstating yield by omitting costs is the most common mistake of beginner investors.

Location and tenant profile

Location is key to the success of the investment. A flat near a university will attract students, one near offices and good transport will attract young professionals, and one in a family district will attract people looking for a longer tenancy. Match the flat to the needs of the target group of tenants.

Pay attention to access to transport, shops and services, and to the area's development prospects. A good location reduces the risk of vacancies and makes it easier to keep a stable, solvent tenant for longer.

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Risks and financing

Investing in rental carries risks. Vacancies lower income, repairs generate unplanned expenses, and a problematic tenant can cause trouble. Changes in the market, in interest rates or in regulations also affect profitability. It is worth having a financial reserve for unforeseen situations.

If you finance the purchase with a loan, remember that the instalment lowers current yield but lets you invest with less of your own capital. Compare renting with other forms of placing savings, to assess whether it suits your goals and accepted level of risk.

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Summary: numbers before emotions

Buying a flat to rent out can be a good investment if you approach it with a cool head. Honest yield calculation, an apt choice of location matched to the tenant, and awareness of the risks are the basis. Treat renting as a business, and base your decisions on numbers, not on hunches.

Frequently asked questions

How do I calculate rental yield?
From the annual rental income subtract all costs: charges, tax, the loan instalment, insurance, repairs and a reserve for vacancies. Relate the result to the purchase price along with transaction costs. Only such a calculation shows real, not apparent, profitability.
Long-term or short-term renting?
Long-term renting gives stability and less involvement, but usually lower income. Short-term renting can be more profitable, but requires servicing, frequent changes of tenants and carries different risks. The choice depends on the location, your time and your strategy.
Is it worth buying to rent with a loan?
A loan lets you invest with less of your own capital, but the instalment lowers current yield and increases risk when rates change. It is worth calculating whether the rental income covers the instalment and costs with a margin, and having a reserve for periods without a tenant.
What are the biggest risks of renting?
The main risks include vacancies, unplanned renovation costs, problematic tenants, and market and legal changes. A good location, careful tenant selection, insurance and a financial reserve for unforeseen situations help limit them.
RealtyTM Team
RealtyTM Team
Editorial

The RealtyTM editorial team prepares guides based on Polish market data and current regulations. Content is reviewed by our subject editors.

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